CN210566053U - Industrial small-tooth-difference speed reducer - Google Patents
Industrial small-tooth-difference speed reducer Download PDFInfo
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- CN210566053U CN210566053U CN201920702350.0U CN201920702350U CN210566053U CN 210566053 U CN210566053 U CN 210566053U CN 201920702350 U CN201920702350 U CN 201920702350U CN 210566053 U CN210566053 U CN 210566053U
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Abstract
The utility model discloses an industrial few tooth difference reduction gear, including casing, input shaft, output shaft and transmission, eccentric bearing endotheca and outer gear of being equipped with on the input shaft, the outer gear meshes with the ring gear on the casing, the difference is few between outer gear and the ring gear number, makes the outer gear rotation rotational speed low, transmission can convert the rotation of outer gear into the low-speed of output shaft, the drive ratio is big, and be equipped with radial clearance adjusting device on the input shaft, can adjust the radial clearance of outer gear and ring gear, effectively guarantee the transmission precision of reduction gear; the device has the advantages of high transmission precision, small volume, large specific number, simple manufacture and assembly and low cost.
Description
Technical Field
The utility model belongs to the technical field of the reduction gear, especially, relate to an industrial few tooth difference reduction gear.
Background
For the occasions with large transmission ratio requirements of high-rotating-speed input and ultra-low-rotating-speed output, a harmonic reducer or an RV reducer is often selected. However, the harmonic reducer has the problems of difficult manufacture, extremely high requirement on the flexible gear material, easy damage of the flexible gear, high cost of a special bearing and the like, and the RV reducer also has the problems of difficult manufacture and high manufacture cost. The small-tooth-difference speed reducer is internally provided with small-tooth-difference planetary gear transmission which is composed of a pair of internal gears with small tooth number difference and an output mechanism and has the advantages of large transmission ratio, simple structure, low manufacturing cost and the like, but the transmission clearance of the small-tooth-difference speed reducer has large influence on transmission precision and is not suitable for occasions with high transmission precision requirements.
SUMMERY OF THE UTILITY MODEL
In order to solve the technical problem, the utility model provides an industrial few tooth difference reduction gear is equipped with radial clearance adjusting device for the radial clearance of adjustment outer gear and ring gear, the clearance is adjustable, and transmission precision is high.
An industrial small tooth difference speed reducer comprises:
the inner wall of the shell is provided with an inner gear ring;
one end of the input shaft extends into the shell, an eccentric bearing inner sleeve is eccentrically sleeved on the input shaft, an external gear is arranged on the eccentric bearing inner sleeve, the number of teeth of the external gear is 2-5 less than that of the internal gear, the external gear is partially meshed with the internal gear, and a radial clearance adjusting device is arranged between the eccentric bearing inner sleeve and the input shaft and used for adjusting the radial clearance between the external gear and the internal gear;
an output shaft extending out of an end of the housing opposite the input shaft, the axis of the output shaft being collinear with the axis of the input shaft;
and the transmission device is respectively connected with the output shaft and the external gear and is used for converting the rotation of the external gear into the rotation of the output shaft.
Preferably, in the above technical solution, the radial clearance adjusting device includes a central shaft, a shaft sleeve, and a radial moving block, the central shaft is detachably and fixedly connected to the input shaft, an axial distance of the input shaft extending into the central shaft is adjustable, the shaft sleeve is disposed between an inner wall of one end of the central shaft, which is far away from the output shaft, and the input shaft, the shaft sleeve is fixed to the input shaft, the radial moving block is disposed on the central shaft, one end of the radial moving block contacts with the shaft sleeve, the other end of the radial moving block contacts with an inner wall of the inner sleeve of the eccentric bearing, a contact surface of the shaft sleeve and the radial moving block is a tapered surface, and a small end of the tapered surface is close to the output.
Above technical scheme is preferred, on the input shaft the tip department of toper face is equipped with the retaining ring, on the input shaft the tip department cover of toper face is equipped with sleeve and jackscrew, the jackscrew passes the sleeve with the axle sleeve with the input shaft is contradicted, the sleeve with center pin connection, the terminal surface of input shaft with be equipped with the clearance between telescopic terminal surface.
Above technical scheme is preferred, the center pin is close to the hole of the one end of output shaft is equipped with the internal thread, the input shaft is equipped with the external screw thread, the one end of input shaft stretch into in the center pin with center pin threaded connection.
Preferably, in the above technical scheme, the transmission device includes a chute member and a sliding key, the chute member is disposed on one side end surface of the output shaft close to the external gear, the chute member is provided with a vertical chute, the chute is disposed along a radial direction of the output shaft, the sliding key is disposed at an eccentric position of the side end surface of the external gear close to the output shaft, and the sliding key is slidably connected with the chute.
Above technical scheme is preferred, the center pin is close to the surface of the one end of output shaft is equipped with first bearing, first bearing is located between output shaft and the spout spare, be equipped with the second bearing between output shaft, spout spare and casing, the hole is close to the one end threaded connection of output shaft has fastening screw, fastening screw is last to be equipped with adjusting nut and bearing retainer ring, bearing retainer ring with first bearing is accepted and is contacted, adjusting nut is used for promoting the spout spare to the external gear direction removes.
Preferably, in the above technical solution, the number of teeth of the external gear is 2 less than that of the ring gear.
Preferably, the housing is provided with an oil hole at a position corresponding to the outer gear.
The utility model has the advantages and positive effects that: the utility model provides an industrial few tooth difference reduction gear, which comprises a housing, an input shaft, an output shaft and a transmission device, wherein an eccentric bearing inner sleeve and an external gear are eccentrically arranged on the input shaft, the external gear is meshed with an inner gear ring on the housing, the difference between the external gear and the number of teeth of the inner gear ring is small, the rotation speed of the external gear is low, the transmission device can convert the rotation of the external gear into the low rotation speed of the output shaft, the transmission ratio is large, a radial clearance adjusting device is arranged on the input shaft, the radial clearance between the external gear and the inner gear ring can be adjusted, and the transmission; the device has the advantages of high transmission precision, small volume, large specific number, simple manufacture and assembly and low cost.
Drawings
Fig. 1 is a front view of a speed reducer according to an embodiment of the present invention;
3 fig. 3 2 3 is 3 a 3 sectional 3 view 3 a 3- 3 a 3 of 3 fig. 3 1 3. 3
Wherein: 1. a housing; 2. an input shaft; 3. an output shaft; 4. an eccentric bearing inner sleeve; 5. an outer gear; 6. a central shaft; 7. a shaft sleeve; 8. a radial moving block; 9. connecting sleeves; 10. a conical surface; 11. a retainer ring; 12. a sleeve; 13. carrying out top thread; 14. an end cap; 15. shaft sealing; 16. macropores; 17. a small hole; 18. fastening screws; 19. a chute member; 20. a sliding key; 21. a chute; 22. an oil hole; 23. a first bearing; 24. a second bearing; 25. adjusting the nut; 26. and a bearing retainer ring.
Detailed Description
It should be noted that, in the present invention, the embodiments and features of the embodiments may be combined with each other without conflict.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are used merely for convenience of description and for simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention. Furthermore, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first," "second," etc. may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art through specific situations.
The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.
In order to solve the problem that the transmission clearance of the small tooth difference speed reducer has a large influence on the transmission precision, the embodiment provides an industrial small tooth difference speed reducer, which comprises a shell 1, an input shaft 2, an output shaft 3 and a transmission device, as shown in fig. 1 and 2. Wherein, the inner wall of the shell 1 is provided with an inner gear ring; one end of an input shaft 2 extends into the shell 1, an eccentric bearing inner sleeve 4 is eccentrically sleeved on the input shaft 2, the eccentric bearing inner sleeve is of an eccentric structure, an external gear 5 is arranged on the eccentric bearing inner sleeve 4, specifically, a bearing is arranged on the eccentric bearing inner sleeve 4, and the external gear 5 is sleeved on an outer ring of the bearing; the number of teeth of the outer gear 5 is 2-5 less than that of the inner gear ring, the outer gear 5 is partially meshed with the inner gear ring, and a radial clearance adjusting device is arranged between the inner eccentric bearing sleeve 4 and the input shaft 2 and used for adjusting the radial clearance between the outer gear 5 and the inner gear ring; the output shaft 3 extends out of one end of the shell 1 relative to the input shaft 2, and the axis of the output shaft 3 is collinear with the axis of the input shaft 2; the transmission is connected to the output shaft 3 and the external gear 5, respectively, for converting the rotation of the external gear 5 into rotation of the output shaft 3.
An inner eccentric bearing sleeve 4 and an outer gear 5 are eccentrically arranged on the input shaft 2, the outer gear 5 is meshed with an inner gear ring on the shell 1, the difference between the number of teeth of the outer gear 5 and the number of teeth of the inner gear ring is small, so that the rotation speed of the outer gear 5 is low, the rotation of the outer gear 5 can be converted into the low rotation speed of the output shaft 3 by a transmission device, the transmission ratio is large, a radial clearance adjusting device is arranged on the input shaft 2, the radial clearance between the outer gear 5 and the inner gear ring can be adjusted; the device has the advantages of high transmission precision, small volume, large specific number, simple manufacture and assembly and low cost.
Specifically, radial clearance adjusting device includes center pin 6, axle sleeve 7 and radial movable block 8, and 6 covers of center pin are established on input shaft 2, and in the left end of input shaft 2 stretched into center pin 6, there was certain distance apart from the left end face of center pin 6, and the right-hand member of input shaft 2 stretched out the right-hand member face of center pin 6, and center pin 6 detachably fixed connection is on input shaft 2, and the axial distance that input shaft 2 deepened center pin 6 is adjustable. The axial distance of the input shaft 2 penetrating into the central shaft 6 can be specifically adjusted by screwing one end of the input shaft 2 penetrating into the shell 1 with the central shaft 6, arranging an internal threaded hole at the part of the central shaft 6 close to the output shaft 3, arranging external threads on the input shaft 2 and screwing the central shaft 6 with the input shaft 2; the central shaft 6 can also be provided with a pin hole, the input shaft 2 is provided with a plurality of pin holes, and the pin holes are positioned by adopting fixing pins. However, the threaded connection has the advantage of stepless adjustment, and the former structure is adopted in the embodiment. The side surface of the other end of the central shaft 6, which is far away from the output shaft 3, is fastened and connected with a connecting sleeve 9 through a screw, and the connecting sleeve 9 is sleeved on the right end part of the input shaft 2 and is fastened and connected with the input shaft 2 through a screw.
A shaft sleeve 7 is arranged between the inner wall of one end of the central shaft 6, which is far away from the output shaft 3, and the input shaft 2, and the shaft sleeve 7 is sleeved and fixed on the input shaft 2. The central shaft 6 is provided with a radial moving block 8, one end of the radial moving block 8 is in contact with the shaft sleeve 7, and the other end of the radial moving block 8 is in contact with the inner wall of the eccentric bearing inner sleeve 4. The surface of the shaft sleeve 7 contacting with the radial moving block 8 is a conical surface 10, and the small end of the conical surface 10 is close to the output shaft 3. Optionally, one end of the radial moving block 8 close to the shaft sleeve 7 is also tapered, and the small end of the taper is arranged towards the shaft sleeve 7. The conical surface of the radial displacement block 8 is in contact with the conical surface 10 of the sleeve 7. The input shaft 2 is screwed into the central shaft 6, the shaft sleeve 7 moves leftwards along with the input shaft 2, the tapered surface 10 on the shaft sleeve 7 pushes the radial moving block 8 to move outwards, and the radial moving block 8 pushes the inner sleeve 4 of the eccentric bearing to move outwards, so that the radial clearance between the outer gear 5 and the inner gear ring is reduced. By changing the length of the input shaft 2 screwed into the central shaft 6, the radial position of the inner sleeve 4 of the eccentric bearing can be changed, so that the radial clearance between the outer gear 5 and the inner gear ring can be adjusted.
The fixed connection of the shaft sleeve 7 and the input shaft 2 is specifically as follows: a retainer ring 11 is arranged at the small end of a conical surface 10 of the shaft sleeve 7 on the input shaft 2 and used for limiting one end of the shaft sleeve 7 to move axially; the large end of the conical surface 10 on the input shaft 2 is sleeved with a sleeve 12 and a jackscrew 13, the jackscrew 13 penetrates through the sleeve 12 to be abutted against the shaft sleeve 7 and the input shaft 2, so that the shaft sleeve 7 and the input shaft 2 are tightly connected with the sleeve 12, and the shaft sleeve 7 and the input shaft 2 can be prevented from moving relative to the sleeve 12; the sleeve 12 is fixedly connected with the central shaft 6 through screws, and a gap is reserved between the end face of the input shaft 2 and the end face of the sleeve 12 for adjusting the gear meshing radial gap by screwing the input shaft 2 inwards. Two ends of the shell 1 are provided with end covers 14, and the end covers 14 are provided with bearings to facilitate the rotation of the input shaft 2 and the output shaft 3. And a shaft seal 15 is arranged between the end cover 14 and the input shaft 2 and the output shaft 3, so that the sealing performance of the device is ensured.
In order to solve the problem that the axes of the external gear and the output shaft are not concentric, the transmission device comprises a chute piece 19 and a sliding key 20, the chute piece 19 is arranged on one side end face, close to the external gear 5, of the output shaft 3, and the chute piece 19 is fixedly connected with the output shaft 3 through screws. The chute member 19 is provided with a vertical chute 21, the chute 21 is arranged along the radial direction of the output shaft 3, the side end surface of the external gear 5 close to the output shaft 3 is eccentrically provided with a sliding key 20, and the sliding key 20 is in sliding connection with the chute 21. The rotation of the external gear 5 drives the sliding key 20 to rotate, and the sliding key 20 slides in the sliding slot 21 and drives the output shaft 3 to rotate. The rotating speed of the output shaft 3 is the same as the rotating speed of the external gear 5, and the rotating speed of the external gear 5 is very low due to the small difference between the number of teeth of the external gear 5 and the number of teeth of the inner gear ring, so that a large transmission ratio is realized.
The inner hole of the end, close to the output shaft 3, of the central shaft 6 is provided with internal threads, optionally, the inner hole is a stepped hole, the stepped hole comprises a large hole 16 and a small hole 17 which are arranged along the direction from the output shaft 3 to the input shaft 2, and the input shaft 2 is in threaded connection with the small hole 17. A fastening screw 18 is connected with the inner thread of the large hole 16, a first bearing 23 is arranged on the outer surface of one end of the central shaft close to the output shaft, the first bearing is positioned between the output shaft and the sliding groove piece, and the first bearing is used for supporting the central shaft and the input shaft to rotate; a second bearing 24 is arranged among the output shaft, the chute piece and the shell, and the second bearing is used for supporting the output shaft and the chute piece to rotate; and the fastening screw is provided with an adjusting nut 25 and a bearing retainer ring 26, the bearing retainer ring is contacted with the first bearing, and the adjusting nut is used for pushing the sliding groove part to move towards the direction of the outer gear so as to adjust the transmission end face gap between the outer gear and the sliding groove part.
The smaller the difference between the numbers of teeth of the inner gear and the outer gear, the larger the transmission ratio obtained by transmission, and in view of the easy workability of the outer gear 5 and the inner gear ring, the number of teeth of the outer gear 5 is 2 less than that of the inner gear ring in this embodiment. The modulus is 1, the tooth number of the inner gear ring is 102, the tooth number of the outer gear 5 is 100, the transmission ratio is 50, and the pressure angle is 30 degrees. In order to ensure lubrication of the gear engagement, the housing 1 is provided with oil holes 22 at positions corresponding to the external gears 5.
The working process of the embodiment: the input shaft 2 rotates to drive the central shaft 6 and the external gear 5 to rotate, the external gear 5 is meshed with the internal gear ring, the number of teeth of the external gear 5 is 2 less than that of the internal gear ring, the rotation speed of the external gear 5 is very low, and the sliding key 20 on the external gear 5 slides in the sliding groove 21 while rotating along with the external gear 5 and drives the output shaft 3 to rotate, so that the rotation speed of the output shaft 3 is equal to the rotation speed of the external gear 5; the reducer is provided with a radial clearance adjusting device, so that the radial clearance of gear engagement can be adjusted after abrasion, and the fastening screw 18 is arranged so that the end surface clearance can be adjusted, the influence of the clearance on the transmission precision can be effectively avoided, and the high transmission precision is ensured; when the radial clearance is adjusted, only the connecting sleeve 9 and the input shaft 2 need to be disassembled, and the input shaft 2 is screwed, when the end surface clearance is adjusted, the adjusting nut 25 is adjusted, the clearance is convenient to adjust, and a plurality of parts are prevented from being disassembled; the harmonic reducer and the RV reducer can be replaced on occasions with large transmission ratio requirements, and the manufacturing is simple and the cost is low.
While one embodiment of the present invention has been described in detail, the description is only a preferred embodiment of the present invention, and should not be considered as limiting the scope of the present invention. All the equivalent changes and improvements made according to the application scope of the present invention should still fall within the patent coverage of the present invention.
Claims (8)
1. An industrial small tooth difference speed reducer is characterized by comprising:
the inner wall of the shell is provided with an inner gear ring;
one end of the input shaft extends into the shell, an eccentric bearing inner sleeve is sleeved on the input shaft, an external gear is arranged on the eccentric bearing inner sleeve, the number of teeth of the external gear is 2-5 less than that of the internal gear, the external gear is partially meshed with the internal gear, and a radial clearance adjusting device is arranged between the eccentric bearing inner sleeve and the input shaft and used for adjusting the radial clearance between the external gear and the internal gear;
an output shaft extending out of an end of the housing opposite the input shaft, the axis of the output shaft being collinear with the axis of the input shaft;
and the transmission device is respectively connected with the output shaft and the external gear and is used for converting the rotation of the external gear into the rotation of the output shaft.
2. The industrial small tooth difference speed reducer according to claim 1, characterized in that: the radial clearance adjusting device comprises a central shaft, a shaft sleeve and a radial moving block, the central shaft is detachably and fixedly connected to the input shaft, the axial distance of the input shaft penetrating into the central shaft is adjustable, the shaft sleeve is arranged between the inner wall of one end, far away from the output shaft, of the central shaft and the input shaft, the shaft sleeve is fixed to the input shaft, the radial moving block is arranged on the central shaft, one end of the radial moving block is in contact with the shaft sleeve, the other end of the radial moving block is in contact with the inner wall of the inner sleeve of the eccentric bearing, the surface, in contact with the radial moving block, of the shaft sleeve is a conical surface, and the small end of the conical surface is close to.
3. The industrial small tooth difference speed reducer according to claim 2, characterized in that: the input shaft is last the tip department of toper face is equipped with the retaining ring, on the input shaft the tip department cover of toper face is equipped with sleeve and jackscrew, the jackscrew passes the sleeve with the axle sleeve with the input shaft is contradicted, the sleeve with the center pin is connected, the terminal surface of input shaft with be equipped with the clearance between telescopic terminal surface.
4. The industrial small tooth difference speed reducer according to claim 2, characterized in that: the inner hole of the end, close to the output shaft, of the central shaft is provided with an internal thread, the input shaft is provided with an external thread, and one end of the input shaft extends into the central shaft and is in threaded connection with the central shaft.
5. The industrial small tooth difference speed reducer according to claim 4, characterized in that: the transmission device comprises a chute piece and a sliding key, the chute piece is arranged on one side end face, close to the outer gear, of the output shaft, a vertical chute is arranged on the chute piece, the chute is arranged along the radial direction of the output shaft, the sliding key is arranged at the eccentric position, close to the side end face of the output shaft, of the outer gear, and the sliding key is connected with the chute in a sliding mode.
6. The industrial small tooth difference speed reducer according to claim 5, characterized in that: the center pin is close to the surface of the one end of output shaft is equipped with first bearing, first bearing is located between output shaft and the spout spare, be equipped with the second bearing between output shaft, spout spare and casing, the hole is close to the one end threaded connection of output shaft has fastening screw, fastening screw is last to be equipped with adjusting nut and retaining ring, the retaining ring with first bearing is accepted and is touched, adjusting nut is used for promoting the spout spare to the external gear direction removes.
7. The industrial small tooth difference speed reducer according to claim 1, characterized in that: the number of teeth of the outer gear is 2 less than that of the inner gear ring.
8. The industrial small tooth difference speed reducer according to claim 1, characterized in that: and an oil hole is formed in the position, corresponding to the outer gear, of the shell.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920702350.0U CN210566053U (en) | 2019-05-16 | 2019-05-16 | Industrial small-tooth-difference speed reducer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920702350.0U CN210566053U (en) | 2019-05-16 | 2019-05-16 | Industrial small-tooth-difference speed reducer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210566053U true CN210566053U (en) | 2020-05-19 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920702350.0U Expired - Fee Related CN210566053U (en) | 2019-05-16 | 2019-05-16 | Industrial small-tooth-difference speed reducer |
Country Status (1)
| Country | Link |
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| CN (1) | CN210566053U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110219947A (en) * | 2019-05-16 | 2019-09-10 | 天津德恒源科技有限公司 | A kind of industrial little tooth difference speed reducer |
-
2019
- 2019-05-16 CN CN201920702350.0U patent/CN210566053U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110219947A (en) * | 2019-05-16 | 2019-09-10 | 天津德恒源科技有限公司 | A kind of industrial little tooth difference speed reducer |
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| Date | Code | Title | Description |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20200519 Termination date: 20210516 |
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| CF01 | Termination of patent right due to non-payment of annual fee |